<template>
    <div class="article">
        <!-- 导航栏 -->
        <van-nav-bar
            fixed
            left-arrow
            @click-left="$router.back()"
            title="文章详情"
            ></van-nav-bar>

        <!--loading-->
        <div class="loading" v-if="loading">
            <van-loading class="inner" type="spinner" color="#1989fa" />
        </div>

        <!-- 文章详情 -->
        <div class="detail">
            <h3 class="title"> {{ article.title }} </h3>
            <div class="author">
                <van-image round width="1rem" :src="article.aut_photo"  height="1rem" fit="cover" />
                <div class="text">
                    <p class="name"> {{ article.aut_name }} </p>
                    <p class="time">{{ article.pubdate }}</p>
                </div>
                <van-button
                    round
                    size="small"
                    type="info"
                    @click="follow"
                    >
                    {{ article.is_followed ? '取关' : '+ 关注'}}
                    </van-button>
            </div>
            <div class="content">
                <!-- 文章内容 -->
                <div v-html="article.content"></div>
                <!-- <div>文章内容</div> -->
            </div>

            <!--分割线-->
            <van-divider>END</van-divider>

            <!--按钮-->
            <div class="btns">
                <van-button round size="small" hairline type="primary" plain
                :icon="article.attitude === 1 ? 'good-job' : 'good-job-o'"
                @click="like"
                >
                    {{ article.attitude === 1 ? '取消' : '点赞' }}
                </van-button>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <van-button round size="small" hairline type="danger" plain
                :icon="article.attitude === 0 ? 'delete' : 'delete-o'"
                @click="dislike"
                >
                    {{ article.attitude === 0 ? '取消' : '不喜欢' }}
                </van-button>
            </div>
        </div>
        <!-- 评论组件 -->
        <Common :artId="artId"></Common>
    </div>
</template>

<script>
import { getArtilceDetail, unFollowUser, followUser, deleteLike, addLike, deleteDisLike, addDisLike } from '@/api/article'
import { mapState } from 'vuex'
import Common from './common.vue'

export default {
  name: 'Article',

  components: {
    Common
  },

  data () {
    return {
      article: {}, // 文章信息
      loading: true // 加载状态
    }
  },

  async created() {
    // 发送请求获取当前文章信息
    const res = await getArtilceDetail(this.artId)
    console.log(res.data)
    this.article = res.data
    // 获取内容后关闭加载状态
    this.loading = false
  },

  methods: {
    async follow() {
      // 未登陆状况
      if (!this.token.token) {
        // 没有登录
        this.$router.push({
          path: '/login',
          query: {
            flag: true, // 有flag，就是登录成功的时候，使用back方式回来
            // fullPath能缓存路由跳转后面携带的参数刷新后依旧存在在PC端能起作用
            back: this.$route.fullPath
          }
        })
        console.log(this.$route.fullPath)
        return this.$toast('请先登录')
      }
      if (this.article.is_followed) {
        // 取消关注
        await unFollowUser(this.article.aut_id)
        this.$toast('取关成功')
      } else {
        // 关注
        await followUser(this.article.aut_id)
        this.$toast('关注成功')
      }
      // 提示
      this.$toast('操作成功')
      // 对 is_followed 取反
      this.article.is_followed = !this.article.is_followed
    },
    // 喜欢不喜欢功能
    async like() {
      if (!this.token.token) {
        // 没有登录
        this.$router.push('/login')
        this.$toast('请先登录')
        return
      }
      if (this.article.attitude === 1) {
        await deleteLike(this.artId)
      } else {
        await addLike(this.artId)
      }
      this.$toast.success('操作成功')
      this.article.attitude = this.article.attitude === 1 ? -1 : 1
    },

    // 点赞取消点赞功能
    async dislike() {
      if (!this.token.token) {
        // 没有登录
        this.$router.push('/login')
        this.$toast('请先登录')
        return
      }
      if (this.article.attitude === 0) {
        await deleteDisLike(this.artId)
      } else {
        await addDisLike(this.artId)
      }
      this.$toast.success('操作成功')
      this.article.attitude = this.article.attitude === 0 ? -1 : 0
    }
  },

  computed: {
    ...mapState('user', ['token']),
    // 获取路由信息上的id
    artId() {
      return this.$route.params.id
    }
  }
}
</script>

<style lang="less" scoped>
    .loading {
        height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .article {
        position: absolute;
        left: 0;
        top: 0;
        overflow-y: scroll;
        width: 100%;
        height: 100%;
    }
    .loading {
        padding-top: 100px;
        text-align: center;
    }
    .error {
        padding-top: 100px;
        text-align: center;
    }
    .detail {
        padding: 50px 10px;
        .title {
            font-size: 16px;
        }
        .zan {
            text-align: center;
        }
        .author {
            padding: 10px 0;
            display: flex;
            .text {
                flex: 1;
                padding-left: 10px;
                line-height: 1.3;
                .name {
                    font-size: 14px;
                    margin: 0;
                }
                .time {
                    margin: 0;
                    font-size: 12px;
                    color: #999;
                }
            }
        }
        .content {
            font-size: 14px;
            overflow: hidden;
            white-space: pre-wrap;
            word-break: break-all;
            ::v-deep img {
                max-width: 100%;
                background: #f9f9f9;
            }
        }
        .btns {
            width: 50%;
            margin: 0 auto;
            display: flex;
            justify-content: space-around;
            align-content: center;
        }
    }
</style>
